is there anywhere to check if the equipment has been changed to calculate the odds? I use flightaware but don't have an account and it only goes back 1 week. I only flew them once IAD-PTY-GIG and lo and behold the IAD-PTY was changed to a 738 and I was greatly disappointed when I walked onto the plane. The PTY-GIG had a last minute equipment change - we were at the gate about to board and were told to go to another gate (which was pretty far actually) but it was still a MAX so the lie flat seats remained, but because it was last minute it wasn't catered properly and there were no blankets or pillows which made for an uncomfortable sleep. So my experience of 2 has been dismal but they are so much cheaper, pretty much half of UA and AC that I am tempted to take my chances again.